#input("\n\n按下 enter 键后退出。")

import sys; x = 'runoob'; sys.stdout.write(x+'\n')

# if expression :
#    suite
# elif expression :
#    suite
# else :
#    suite

x = "a"
y = "b"
# 换行输出
print(x)
print(y)

print('---------')
# 不换行输出
print(x, end=" ")
print(y, end=" ")
print()